Chapter Test Probability

Probability is ...

• the likelihood that an event will occur.

• an event that involves coins.

• a guarantee of an event.

• a comparison of the odds of an event.

Which of the following statements is FALSE?

• experimental probability is dependant on the results of actual trials or experiments.

• experimental probability may change as more trials are conducted.

• experimental probability and theoretical probability will always be the same if 100 or more trials are conducted.

• theoretical probability can be calculated without performing trials or experiments.

Probability can be written as ...

• a fraction
• a decimal
• a percent
• all of the above

What is the probability of an event that will definitely happen?

• 0

• 1

• .5

• 100

What is the probability of an event that will not happen?

• 0

• 1

• 2

• 3

I roll a standard 6-sided die and flip a coin. What is the sample space for this experiment.

• 6

• {1, 2, 3, 4, 5, 6, Heads, Tails}

• 12

• {1 & Heads, 2 & Heads, 3 & Heads, 4 & Heads, 5 & Heads, 6 & Heads, 1 & Tails, 2 & Tails, 3 & Tails, 4 & Tails, 5 & Tails, 6 & Tails}

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?

• 5/11
• 5/6
• 1/3
• 5

A bag contains 5 quarters, 2 dimes, and 4 pennies. What are the odds in favour of choosing a penny?

• 7:4

• 4:7

• 11:4

• 4:11

A bag contains 5 quarters, 2 dimes, and 4 pennies. What are the odds against choosing a dime or a penny?

• 8:5

• 5:8

• 6:5

• 5:6

The probability of it raining today is 30%.  What is the probability that it will NOT rain?

• 30%
• 70%
• 100%
• 0%